<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script src="/js/vue.js"></script>
    <div id ="app">
      <p>{{msg}}</p >
    </div>
    
    <script>
     let app =new Vue({
     el:"#app",
      data:{
      msg:'vue 实例创建成功！'
      }
     })
    </script> 
</body>
</html>